Bearing for traveling brushes.



V T. P. CHISHOLM.

BEAEING FOR TEAVELING BEUSHES.

APPLIOATION nun BBC-15, 1910,

999,'748. Patented Au 8,1911.

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coLuMBIA PLANOGRAPN co.. WASHXNLITBN. n. c.

THOMAS I'. CHISHOLM, OF SAG-INAW, MICHIGAN.

BEARING- FOR TRAVELING BRUSHES.

Specfication of Letters Patent.

Application filed December 15, 1910.

Patented Aug. s, 1911.

Serial NO. 5973580.

Te all whom it may concem:

Be it known that I, THOMAS P. CHISHOLM, a citizen of the United States,residing at Saguaw, in the county of Saginaw and State of Michigan, haveinvented certain new and useful Improvements in Bearings for TravelingBrushes; and I do hereby declare the following to be a full, clear andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to machines for cleaning grain seeds and beans orthe like, and pertains more particularly to the construction andmounting of the traveling brush commonly used to clean the underside ofthe screens used in machines of this character.

The object of this invention is to provide a hearing for a travelingbrush that will be simple in Construction, etficient in operation, andso constructed as to prevent dust and grit from gaining access to therubbing parts of the hearing.

A further object is to provide means by which the brush may be readilydropped out of contact with the screens and returned to contacttherewith.

lVith these and certain other objects in View which will appear later inthe specifications, the invention consists in the parts shown andclaimed.

In the accompanying drawings, Figure l is a part vertical section of agrain cleaner with my improvement attached; Fig. 2 is a perspectivedetail of the brush bracket and the parts of the hearing, disassembled;Fig. 3 is a detail partly in vertical section, taken on the line 00-90of Fig. l; Fg. 4 is a side View of the bracket that supports the tube onwhich the brush travels; and Fig. 5 is a vertical section through thehearing, showing the parts assembled.

In the drawings, l represents the frame of the machine, 2 is the screen,and 3 the traveling brush adapted to be moved transversely from side toside of the screen. The brush may be traversed back and forth by anysuitable means as a cord 4. The cord may be operated by any suitableform of mechanism, the drive mechanism b-eing omitted from the drawingsas it forms no part of my invention. The brush 3 is seated in a bracket5 adapted to travel back and forth along a hollow bar or tube 6, beingactuated by the cord 4 as above described. The tube 6 may be mounted insuitable supporting brackets carried by the frame 1. The details of thebracket will be described later.

The Construction of my improved dirtproof bearing is shown in Figs. 2, 3and 5. The underside of tube 6 is slotted as at 6% surrounding the tube'6 but preferably out of contact with it is a sleeve 7 preferably madeof cast metal. Formed integral with the sleeve 7 is a web 8 thatprojects radially inward, as shown in Figs. 2 and 5, the inner end ofthe web 8 terminating in a cylindrical hub 9, the aXis of whichcoincides with the axis of the sleeve 7; the hub 9, sleeve 7 and web 8being formed in one piece and presenting somewhat the appearance of awheel having "a hub and only one spoke. The sleeve is assembled on thetube 6 by sliding on from the end, the web 8 being received in the slot6 It is desirable to minimize the wear on the hub 9 and I thereforeprefer to surround it by a bushing 10, the lower periphery of which isformed with a slot 10 to slip over the web 8. The bushing 10 ispreferably made of a tube of brass or other anti-frction metal, and isof such diameter as to slide easily within the tube 6.

lVhen the sleeve 7, bushing 10 and tube 6 are assembled, the sleeve willslide easily back and forth over the tube 6, but the inner surface ofthe sleeve 7 will be out of contact with the outer surface of the tube6, there being a clearance between themto prevent the wear on the outersurface of the tube and the inner surface of the sleeve which wouldoccur if the weight of the brush and bracket were carried directly onthe tube, on account of the grinding action of the grit that fallsthrough from the screen.

The bearing contact is between the inner surface of the tube and theouter surface of the bushing 10, and is on the bottom and inside of thetube 6 instead of being on the top and outside as would be the case ifan ordinary hearing were used.

I prefer to mount the brush 3 on the sleeve 7 so that the brush may betilted at various angles. For this purpose a number of Constructiondetails may be employed, but I prefer the Construction which will now bedescribed.

On the sleeve 7 is received a bored hub ll of the bracket 5. In order toprovide means by which the bracket 5 and its brush 2 may be tlted atvarious angles to suit various inclinations of the screens 2, I preferto loosely mount the bored hub ll on the sleeve 7 so that it may beturned on the sleeve. Longitudinal movement ot' the hub ll withreference to sleeve 7 is prevented by means of a set screw 12 or similardevice, the end of which is received in a peripheral groove 7 formed onthe sleeve T. By this means the angle of inclination of the brush 3 maybe readily varied and it may be clamped in any desired position.

It is essential that the cord 4; remain straight while moving the brushfrom one extremity of its travel to the other, and to permit of the cordremaining straight while the angle of inclination of the brush isvaried, I provide around the bored hub ll a semi-circular slot 13through which the cord i passes, as shown in Figs. 2 and 5. The cord 4is provided with buttons l-l by which the bracket 5 is moved.

By the means above described it will be seen that I have produced asimple and inexpensive hearing that is practically dustproof andself-cleaning, and is so arranged that the rubbing surfaces can easilybe renewed if they become worn.

In changing brushes or in changing screens and sometimes also during theoperation of the machine it is desirable to quickly lower the brush totake it out ot contact with the screen. For this purpose I have producedthe device illustratcd in Figs. 3 and l, in which 15, 15 are blockshaving their lower ends beveled upwardly as at 15 and resting onsuitable beveled seats 16, 10 The blocks are secured to the oppositeends of tube 6 by means of set screws 17 or otherwise. The beveled seat16 is tormed with a pair of laterally projecting lugs 18 between whichis pivoted an L-shaped lever 19, as shown in Fig. 3. Moving the lover 19out to the position shown in dotted lines, releases the block 15 andalso the corresponding block at the opposite end of the tube 6, allowingthe tube to drop down and outwardly as indicated by dotted lines in Fig.3, thereby releasing the brush 3 from contact with the screen 2.Similarly, the brush can be quickly returned to contact with the screenby lowering the handle.

By the means above described l have produced a simple, inexpensivehearing tor traveling brushes, and means 'tor actuating the bearing tobring the brush quickly into contact or out of contact with the screen.

Having described my invention, what I claim and desre to secure byLetters Patent,

ISI-

l. A hearing for traveling brushes comprising a tube formed with alongitudinal slot in its underside, a sleeve surrounding said tube butout of contact therewith, a radial inwardly projecting web on saidsleeve, a hub on said web, and means adapted to adjustably secure abrush to said sleeve.

2. A hearing 'or traveling brushes comprising a tube formed with alongitudinal slot in its underside, a sleeve surrounding said tube butout of contact therewith, a radial inwardly projecting web on saidsleeve, a hub on said web, a slotted bushing on said hub, and meansadapted to adjustably secure a brush to said sleeve.

3. A bearing ?for traveling brushes comprising a tube formed with alongitudinal slot in its underside, a sleeve surrounding said tube butout of contact therewith, a radial inwardly projecting web forned,integral with said sleeve, a central cylindrical hub formed integralwith said web, a slotted bushing on said hub, and means adapted toadjustably secure a brush to said sleeve.

t. A bearing for traveling brushes comprising a tube formed with alongitudinal slot in its underside, a sleeve surrounding said tube butout of contact therewith, a radial inwardly projecting web on saidsleeve, a hub on said web, an apertured hub surrounding said sleeve, abracket carried by said apertured hub, and means 'or adjustably securingsaid apertured hub to said sleeve.

5. A hearing for traveling brushes comprising a tube formed with alongitudinal slot in its underside, a sleeve surrounding said tube butout ot contact therowith, a radial inwardly projecting web on saidsleeve, a hub on said web, an apertured hub, a set screw in said hub,and a bracket carried by said hub and adapted to receive a travelingbrush.

(3. In a hearing for traveling brushes, the combination with a tubeformed with a longitudinal slot on its under side, means for adjustablysupporting the ends of said tube, a sleeve surrounding said tube but outot contact therewith, a radial inwardly projecting web on said sleeve, ahub on said web, and means adapted to adjustably secure a brush to saidsleeve.

ln testimony whereof, I atlix my signature in presence of two witnesses.

THOMAS P. CHISHOLM.

lVitnesses:

Cnnrsrrnn A. BRAIDEL, GEO. Vi SMITI-I.

copies of this patent may be obtained for five cents each, by addressngthe Commissioner of Patents. Washington, D. C.

